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<p>There's been a fair amount of information given in this thread.
Unfortunately, most of it is wrong, leading to much confusion.<br>
<br>
In no particular order, I want to address a few points<br>
<br>
The degraded service on July 18th is unrelated, as it only
impacted the standard tile layer for 2.5 hours. It's best not to
bring up unrelated events, as they only lead to confusion.<br>
<br>
Several people have been talking about the north american render
server (pyrene) without even checking that Martin is being served
by that server! It's bad to speculate without information, as that
only leads to confusion. I would guess it's about a 50% chance
they are being served from pyrene, and 50% from the European
servers.<br>
<br>
Even if they're on pyrene, it doesn't establish that it's capacity
has anything to do with the problems experienced. Although it's
true that pyrene no longer has the capacity to serve all of the
traffic from the Americas, it isn't being sent all of that
traffic. It is at peak capacity between 8 AM and 6 PM EDT, and
during that time the main impact is not that users see empty
tiles, it's that the map is not up to date.<br>
<br>
It is better to ask more questions and not have an answer then to
give a possibly wrong answer and misinform someone, which is what
has happened here.<br>
<br>
There's two questions that could be asked as follow-up, which can
then guide towards a correct diagnosis.<br>
<br>
The first is for information from the
<a class="moz-txt-link-freetext" href="https://tile.openstreetmap.org/cgi-bin/debug">https://tile.openstreetmap.org/cgi-bin/debug</a> page. This will
reliably get you a user's IP and what cache POP they are being
served from. This is very limited information, and in most cases I
would go for the second option.<br>
<br>
The second is to get the user to use the browser developer tools
to see a) if the tiles are timing out or error codes being
returned, b) what tiles in particular are showing problems, c)
what the POP and render server for the problem tiles is, using the
headers. It's important to remember that this render server can be
a different one for each tile, and will not be the same as the
debug page.<br>
<br>
I asked the first because this is enough information for me to
confirm or disprove a couple of theories. I'm not going into
details on those theories, because there's no point confusing a
user with possibly incorrect theories.<br>
</p>
<div class="moz-cite-prefix">On 2022-07-25 5:06 p.m., Pierre Béland
via Talk-ca wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1279012229.2957409.1658793989122@mail.yahoo.com">
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style="font-family:verdana, helvetica,
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<div>
<div dir="ltr" data-setdir="false">Daniel,</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Les tuiles z13+ sont
mise-à-jour assez rapidement. Par contre, compte-tenu de la
surcharge des serveurs de tuile, la décision prise est de
mettre-à-jour moins fréquemment les tuiles z12-.</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Et pour montrer encore la
complexité à résoudre de tels problèmes, il faut lire le
billet <a
href="https://github.com/openstreetmap/operations/issues/625#issuecomment-1146706362"
rel="nofollow" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/openstreetmap/operations/issues/625#issuecomment-1146706362</a></div>
<div dir="ltr" data-setdir="false"><strong
class="ydpba3fea3ccss-truncate"><a
class="ydpba3fea3cauthor ydpba3fea3cLink--primary
ydpba3fea3ccss-truncate-target ydpba3fea3cwidth-fit"
data-hovercard-type="user"
data-hovercard-url="/users/tomhughes/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://github.com/tomhughes" rel="nofollow"
target="_blank" moz-do-not-send="true">tomhughes</a> </strong>
commented <a
href="https://github.com/openstreetmap/operations/issues/625#issuecomment-1139501453"
id="ydpba3fea3cissuecomment-1139501453-permalink"
class="ydpba3fea3cLink--secondary ydpba3fea3cjs-timestamp"
rel="nofollow" target="_blank" moz-do-not-send="true">on
27 May</a> <span
class="ydpba3fea3cjs-comment-edit-history"><span
class="ydpba3fea3cjs-comment-edit-history"><span
class="ydpba3fea3cd-inline-block
ydpba3fea3ccolor-fg-muted">où on parle entre autres
des règles de rendu<br>
</span></span></span></div>
<div class="ydpba3fea3cedit-comment-hide">
<table class="ydpba3fea3cd-block
ydpba3fea3cuser-select-contain yahoo-compose-table-card"
data-paste-markdown-skip="">
<tbody class="ydpba3fea3cd-block">
<tr class="ydpba3fea3cd-block">
<td class="ydpba3fea3cd-block ydpba3fea3ccomment-body
ydpba3fea3cmarkdown-body ydpba3fea3cjs-comment-body">
<p> The north american render server is quite busy
(at least relative to the others) and<br>
it will prioritise rendering tiles which don't
exist yet over rerendering out of date ones when
it is busy.</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="ydp22da3d8csignature"><span
style="font-style:italic;color:rgb(0, 0,
191);font-weight:bold;"> <br>
<font style="background-color: inherit;" face="garamond,
new york, times, serif">Pierre </font><br>
</span></div>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div id="ydp49e46ae3yahoo_quoted_9317975977"
class="ydp49e46ae3yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial,
sans-serif;font-size:13px;color:#26282a;">
<div> Le lundi 25 juillet 2022 à 16 h 39 min 19 s UTC−4,
Daniel @jfd553 <a class="moz-txt-link-rfc2396E" href="mailto:jfd553@hotmail.com"><jfd553@hotmail.com></a> a écrit : </div>
<div><br>
</div>
<div><br>
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<div>
<div id="ydp49e46ae3yiv2846494493">
<div>
<div class="ydp49e46ae3yiv2846494493WordSection1">
<p class="ydp49e46ae3yiv2846494493MsoNormal"><span
lang="FR-CA">Merci Pierre,</span></p>
<p class="ydp49e46ae3yiv2846494493MsoNormal"><span
lang="FR-CA">Malgré avoir vidé la cache de mon
navigateur, certaines régions ne sont toujours pas
rendues après une semaine. Un nouveau serveur sera
le bienvenu.
</span></p>
<p class="ydp49e46ae3yiv2846494493MsoNormal"><span
lang="FR-CA">Daniel</span></p>
<p class="ydp49e46ae3yiv2846494493MsoNormal"><span
lang="FR-CA"> </span></p>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
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